Air purifier



FIG. 1 is a perspective view of an air purifier showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right side view thereof, a left side view being symmetrical to the right view;

FIG. 7 is a sectional view taken along line 7—7 in FIG. 2; and,

FIG. 8 is a sectional view taken along line 8—8 in FIG. 2.

The broken line showing of the environment is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an air purifier, as shown and described. 